Description

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. Starting in version 0.7.0 and prior to versions 0.7.15 and 0.8.3, Himmelblau is vulnerable to leaking credentials in debug logs. When debug logging is enabled, user access tokens are inadvertently logged, potentially exposing sensitive authentication data. Similarly, Kerberos Ticket-Granting Tickets (TGTs) are logged when debug logging is enabled. Both issues pose a risk of exposing sensitive credentials, particularly in environments where debug logging is enabled. Himmelblau versions 0.7.15 and 0.8.3 contain a patch that fixes both issues. Some workarounds are available for users who are unable to upgrade. For the **logon compliance script issue**, disable the `logon_script` option in `/etc/himmelblau/himmelblau.conf`, and avoid using the `-d` flag when starting the `himmelblaud` daemon. For the Kerberos CCache issue, one may disable debug logging globally by setting the `debug` option in `/etc/himmelblau/himmelblau.conf` to `false` and avoiding the `-d` parameter when starting `himmelblaud`.

Classification

CVE ID: CVE-2025-24034

CVSS Base Severity: LOW

CVSS Base Score: 3.2

Affected Products

Vendor: himmelblau-idm

Product: himmelblau

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 12.63% (scored less or equal to compared to others)

EPSS Date: 2025-02-21 (when was this score calculated)

References

https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-p989-2f5w-9cf6
https://github.com/himmelblau-idm/himmelblau/commit/1216804f15ce5dc74bb5da48b5508c41d2ece8fa
https://github.com/himmelblau-idm/himmelblau/releases/tag/0.7.15
https://github.com/himmelblau-idm/himmelblau/releases/tag/0.8.3
https://manpages.opensuse.org/Tumbleweed/himmelblau/himmelblau.conf.5.en.html
https://manpages.opensuse.org/Tumbleweed/himmelblau/himmelblaud.8.en.html

Timeline